Dear All, We are delighted to present the MaPSS Seminar topic of Monday 9th May; please see the abstract below. **From this Semester the Seminar will always run on Monday, at 5:00pm in 535A** Following the talk, there will be pizza on offer. Speaker: Ross Ogilvie (Sydney University) Title: Stratified Morse Theory Abstract: Morse Theory is a powerful technique for computing the topology of manifolds. However, not all spaces are manifolds. Stratified spaces are a those that, roughly speaking, are manifolds of different dimensions glued together. This picture heavy introduction to stratified Morse theory will introduce the basic notions and theorems, and compare them to their more familiar counterparts. Supervisors, please encourage your students to attend. Thanks, MaPSS Organizers